1f05cddf9SRui Paulo /*
2f05cddf9SRui Paulo * WPA Supplicant - auto scan
3f05cddf9SRui Paulo * Copyright (c) 2012, Intel Corporation. All rights reserved.
4780fb4a2SCy Schubert * Copyright 2015 Intel Deutschland GmbH
5f05cddf9SRui Paulo *
6f05cddf9SRui Paulo * This software may be distributed under the terms of the BSD license.
7f05cddf9SRui Paulo * See README for more details.
8f05cddf9SRui Paulo */
9f05cddf9SRui Paulo
10f05cddf9SRui Paulo #include "includes.h"
11f05cddf9SRui Paulo
12f05cddf9SRui Paulo #include "common.h"
13f05cddf9SRui Paulo #include "config.h"
14f05cddf9SRui Paulo #include "wpa_supplicant_i.h"
15f05cddf9SRui Paulo #include "bss.h"
16f05cddf9SRui Paulo #include "scan.h"
17f05cddf9SRui Paulo #include "autoscan.h"
18f05cddf9SRui Paulo
19f05cddf9SRui Paulo
20f05cddf9SRui Paulo static const struct autoscan_ops * autoscan_modules[] = {
21f05cddf9SRui Paulo #ifdef CONFIG_AUTOSCAN_EXPONENTIAL
22f05cddf9SRui Paulo &autoscan_exponential_ops,
23f05cddf9SRui Paulo #endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
24f05cddf9SRui Paulo #ifdef CONFIG_AUTOSCAN_PERIODIC
25f05cddf9SRui Paulo &autoscan_periodic_ops,
26f05cddf9SRui Paulo #endif /* CONFIG_AUTOSCAN_PERIODIC */
27f05cddf9SRui Paulo NULL
28f05cddf9SRui Paulo };
29f05cddf9SRui Paulo
30f05cddf9SRui Paulo
request_scan(struct wpa_supplicant * wpa_s)31f05cddf9SRui Paulo static void request_scan(struct wpa_supplicant *wpa_s)
32f05cddf9SRui Paulo {
33f05cddf9SRui Paulo wpa_s->scan_req = MANUAL_SCAN_REQ;
34f05cddf9SRui Paulo
35f05cddf9SRui Paulo if (wpa_supplicant_req_sched_scan(wpa_s))
36f05cddf9SRui Paulo wpa_supplicant_req_scan(wpa_s, wpa_s->scan_interval, 0);
37f05cddf9SRui Paulo }
38f05cddf9SRui Paulo
39f05cddf9SRui Paulo
autoscan_init(struct wpa_supplicant * wpa_s,int req_scan)40f05cddf9SRui Paulo int autoscan_init(struct wpa_supplicant *wpa_s, int req_scan)
41f05cddf9SRui Paulo {
42f05cddf9SRui Paulo const char *name = wpa_s->conf->autoscan;
43f05cddf9SRui Paulo const char *params;
44f05cddf9SRui Paulo size_t nlen;
45f05cddf9SRui Paulo int i;
46f05cddf9SRui Paulo const struct autoscan_ops *ops = NULL;
47780fb4a2SCy Schubert struct sched_scan_plan *scan_plans;
48780fb4a2SCy Schubert
49780fb4a2SCy Schubert /* Give preference to scheduled scan plans if supported/configured */
50*85732ac8SCy Schubert if (wpa_s->sched_scan_plans) {
51*85732ac8SCy Schubert wpa_printf(MSG_DEBUG,
52*85732ac8SCy Schubert "autoscan: sched_scan_plans set - use it instead");
53780fb4a2SCy Schubert return 0;
54*85732ac8SCy Schubert }
55f05cddf9SRui Paulo
56*85732ac8SCy Schubert if (wpa_s->autoscan && wpa_s->autoscan_priv) {
57*85732ac8SCy Schubert wpa_printf(MSG_DEBUG, "autoscan: Already initialized");
58f05cddf9SRui Paulo return 0;
59*85732ac8SCy Schubert }
60f05cddf9SRui Paulo
61f05cddf9SRui Paulo if (name == NULL)
62f05cddf9SRui Paulo return 0;
63f05cddf9SRui Paulo
64f05cddf9SRui Paulo params = os_strchr(name, ':');
65f05cddf9SRui Paulo if (params == NULL) {
66f05cddf9SRui Paulo params = "";
67f05cddf9SRui Paulo nlen = os_strlen(name);
68f05cddf9SRui Paulo } else {
69f05cddf9SRui Paulo nlen = params - name;
70f05cddf9SRui Paulo params++;
71f05cddf9SRui Paulo }
72f05cddf9SRui Paulo
73f05cddf9SRui Paulo for (i = 0; autoscan_modules[i]; i++) {
74f05cddf9SRui Paulo if (os_strncmp(name, autoscan_modules[i]->name, nlen) == 0) {
75f05cddf9SRui Paulo ops = autoscan_modules[i];
76f05cddf9SRui Paulo break;
77f05cddf9SRui Paulo }
78f05cddf9SRui Paulo }
79f05cddf9SRui Paulo
80f05cddf9SRui Paulo if (ops == NULL) {
81f05cddf9SRui Paulo wpa_printf(MSG_ERROR, "autoscan: Could not find module "
82f05cddf9SRui Paulo "matching the parameter '%s'", name);
83f05cddf9SRui Paulo return -1;
84f05cddf9SRui Paulo }
85f05cddf9SRui Paulo
86780fb4a2SCy Schubert scan_plans = os_malloc(sizeof(*wpa_s->sched_scan_plans));
87780fb4a2SCy Schubert if (!scan_plans)
88780fb4a2SCy Schubert return -1;
89780fb4a2SCy Schubert
90f05cddf9SRui Paulo wpa_s->autoscan_params = NULL;
91f05cddf9SRui Paulo
92f05cddf9SRui Paulo wpa_s->autoscan_priv = ops->init(wpa_s, params);
93780fb4a2SCy Schubert if (!wpa_s->autoscan_priv) {
94780fb4a2SCy Schubert os_free(scan_plans);
95f05cddf9SRui Paulo return -1;
96780fb4a2SCy Schubert }
97780fb4a2SCy Schubert
98780fb4a2SCy Schubert scan_plans[0].interval = 5;
99780fb4a2SCy Schubert scan_plans[0].iterations = 0;
100780fb4a2SCy Schubert os_free(wpa_s->sched_scan_plans);
101780fb4a2SCy Schubert wpa_s->sched_scan_plans = scan_plans;
102780fb4a2SCy Schubert wpa_s->sched_scan_plans_num = 1;
103f05cddf9SRui Paulo wpa_s->autoscan = ops;
104f05cddf9SRui Paulo
105f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "autoscan: Initialized module '%s' with "
106f05cddf9SRui Paulo "parameters '%s'", ops->name, params);
107f05cddf9SRui Paulo if (!req_scan)
108f05cddf9SRui Paulo return 0;
109f05cddf9SRui Paulo
110f05cddf9SRui Paulo /*
111f05cddf9SRui Paulo * Cancelling existing scan requests, if any.
112f05cddf9SRui Paulo */
113f05cddf9SRui Paulo wpa_supplicant_cancel_sched_scan(wpa_s);
114f05cddf9SRui Paulo wpa_supplicant_cancel_scan(wpa_s);
115f05cddf9SRui Paulo
116f05cddf9SRui Paulo /*
117f05cddf9SRui Paulo * Firing first scan, which will lead to call autoscan_notify_scan.
118f05cddf9SRui Paulo */
119f05cddf9SRui Paulo request_scan(wpa_s);
120f05cddf9SRui Paulo
121f05cddf9SRui Paulo return 0;
122f05cddf9SRui Paulo }
123f05cddf9SRui Paulo
124f05cddf9SRui Paulo
autoscan_deinit(struct wpa_supplicant * wpa_s)125f05cddf9SRui Paulo void autoscan_deinit(struct wpa_supplicant *wpa_s)
126f05cddf9SRui Paulo {
127f05cddf9SRui Paulo if (wpa_s->autoscan && wpa_s->autoscan_priv) {
128f05cddf9SRui Paulo wpa_printf(MSG_DEBUG, "autoscan: Deinitializing module '%s'",
129f05cddf9SRui Paulo wpa_s->autoscan->name);
130f05cddf9SRui Paulo wpa_s->autoscan->deinit(wpa_s->autoscan_priv);
131f05cddf9SRui Paulo wpa_s->autoscan = NULL;
132f05cddf9SRui Paulo wpa_s->autoscan_priv = NULL;
133f05cddf9SRui Paulo
134f05cddf9SRui Paulo wpa_s->scan_interval = 5;
135780fb4a2SCy Schubert
136780fb4a2SCy Schubert os_free(wpa_s->sched_scan_plans);
137780fb4a2SCy Schubert wpa_s->sched_scan_plans = NULL;
138780fb4a2SCy Schubert wpa_s->sched_scan_plans_num = 0;
139f05cddf9SRui Paulo }
140f05cddf9SRui Paulo }
141f05cddf9SRui Paulo
142f05cddf9SRui Paulo
autoscan_notify_scan(struct wpa_supplicant * wpa_s,struct wpa_scan_results * scan_res)143f05cddf9SRui Paulo int autoscan_notify_scan(struct wpa_supplicant *wpa_s,
144f05cddf9SRui Paulo struct wpa_scan_results *scan_res)
145f05cddf9SRui Paulo {
146f05cddf9SRui Paulo int interval;
147f05cddf9SRui Paulo
148f05cddf9SRui Paulo if (wpa_s->autoscan && wpa_s->autoscan_priv) {
149f05cddf9SRui Paulo interval = wpa_s->autoscan->notify_scan(wpa_s->autoscan_priv,
150f05cddf9SRui Paulo scan_res);
151f05cddf9SRui Paulo
152f05cddf9SRui Paulo if (interval <= 0)
153f05cddf9SRui Paulo return -1;
154f05cddf9SRui Paulo
155f05cddf9SRui Paulo wpa_s->scan_interval = interval;
156780fb4a2SCy Schubert wpa_s->sched_scan_plans[0].interval = interval;
157f05cddf9SRui Paulo
158f05cddf9SRui Paulo request_scan(wpa_s);
159f05cddf9SRui Paulo }
160f05cddf9SRui Paulo
161f05cddf9SRui Paulo return 0;
162f05cddf9SRui Paulo }
163